From 3c00ead616c99b91f88e0bce31a29cad6ba900a2 Mon Sep 17 00:00:00 2001
From: Christopher Fremond <34804391+Frenchris@users.noreply.github.com>
Date: Wed, 23 Jun 2021 16:15:08 +0100
Subject: [PATCH] Update README.md

---
 subjects/options/README.md | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/subjects/options/README.md b/subjects/options/README.md
index 807c4b3c..544316be 100644
--- a/subjects/options/README.md
+++ b/subjects/options/README.md
@@ -41,5 +41,7 @@ $ go run . -eeeeee | cat -e
 00000000 00000000 00000000 00010000$
 $ go run . -% | cat -e
 Invalid Option$
+$ go run . - | cat -e
+Invalid Option$
 $
 ```